End of season 50 km looped route in some of the Chilterns finest countryside, with historic trails, rolling hills, nature reserves, and fantastic views. At the basecamp in Henley, there’s a Saturday night celebration BBQ, bar & entertainment, with extensive on-site camping & parking options. A route with real variety and some wonderful scenery – and easily accessible from London. You’ll get full support & hospitality, and with a 23 or 27 km option 25km loop and a 10K also available, there’s a Chiltern Challenge for everyone!